192691221050 has 12 divisors (see below), whose sum is σ = 358405671246. Its totient is φ = 77076488400.

The previous prime is 192691221017. The next prime is 192691221059. The reversal of 192691221050 is 50122196291.

It can be written as a sum of positive squares in 3 ways, for example, as 165299978041 + 27391243009 = 406571^2 + 165503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 192691220995 and 192691221013.

It is not an unprimeable number, because it can be changed into a prime (192691221059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1926912161 + ... + 1926912260.

Almost surely, 2^192691221050 is an apocalyptic number.

192691221050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

192691221050 is a deficient number, since it is larger than the sum of its proper divisors (165714450196).

192691221050 is a wasteful number, since it uses less digits than its factorization.

192691221050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853824433 (or 3853824428 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 192691221050 in words is "one hundred ninety-two billion, six hundred ninety-one million, two hundred twenty-one thousand, fifty".